tree 1029bdbda2edf550b6c6c448362ca849f1022d3f
parent 640b9135c888f02afd058c213303ffbd10d3908d
author Linus Walleij <linus.walleij@linaro.org> 1460292753 +0200
committer Linus Walleij <linus.walleij@linaro.org> 1460635408 +0200

gpio: wm831x: use the new open drain callback

The WM831x GPIOs clearly have a dedicated open drain control
register. Implement support for controlling this from GPIO
descriptor tables or other hardware descriptions such as
device tree by implementing the .set_single_ended() callback.

Before this patch, lines requesting open drain will just be
switched to input mode by the framework, thus emulating open
drain. But the hardware can do the real thing, so let's
support that.

As part of this, rename the debugfs string for output mode
from "CMOS" to "push-pull" because it is the term used in
the framework to signify a tomem-pole CMOS output.

Cc: patches@opensource.wolfsonmicro.com
Cc: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>